current bounds on the number of colors: 0 -- 17 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:34 2012 Optimize a model with 129 rows, 150 columns and 472 nonzeros Presolve removed 4 rows and 32 columns Presolve time: 0.00s Presolved: 125 rows, 118 columns, 440 nonzeros Variable types: 0 continuous, 118 integer (118 binary) Root relaxation: objective 0.000000e+00, 25 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (42 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 8 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:34 2012 Optimize a model with 73 rows, 82 columns and 236 nonzeros Presolve removed 4 rows and 16 columns Presolve time: 0.00s Presolved: 69 rows, 66 columns, 220 nonzeros Variable types: 0 continuous, 66 integer (66 binary) Root relaxation: objective 0.000000e+00, 25 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (25 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 4 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:34 2012 Optimize a model with 45 rows, 48 columns and 118 nonzeros Presolve removed 17 rows and 21 columns Presolve time: 0.00s Presolved: 28 rows, 27 columns, 84 nonzeros Variable types: 0 continuous, 27 integer (27 binary) Root relaxation: objective 0.000000e+00, 14 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 10 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (37 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 2 -- 4 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:34 2012 Optimize a model with 59 rows, 65 columns and 177 nonzeros Presolve removed 4 rows and 12 columns Presolve time: 0.00s Presolved: 55 rows, 53 columns, 165 nonzeros Variable types: 0 continuous, 53 integer (53 binary) Root relaxation: objective 0.000000e+00, 23 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (23 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% optimal solution found: number of colors: 3